Toggle sidebar Toggle sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

macOS Tahoe 26.4 Beta 1 - Bug fixes, changes, and more

Status
The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
WilliApple

WilliApple

macrumors 65832
Original poster
ed.png

Release Date ― 16 February 2026
Build Number ― 25E5207k
Apple Silicon System Firmware Version ― 13822.100.791.0.1
T2 BridgeOS System Firmware Version ― 23.16.14213.5.7
New Features & Changes (Found something new? Please press "Edit" on the bottom of this post and add it here)
Resolved Issues
New Issues
(If you are encountering any issues, please press "Edit" on the bottom of this post and add it here)
  • Getting Apple Webkit crashes in Safari all day long - did not happen in 26.3
  • When filling your screen with the App Store, the title of the View may be wider than expected
  • HFS external drives may not mount (workaround: use 'diskutil mount' command in Terminal)
  • DMG disk images may not mount (workaround: use 'hdutil attach' command in Terminal)
  • I can no longer name a file in a file picker a name like "Steve Jobs.02-09-1984.area video". as soon as I press ".area " the text I type disappears.
Remaining Issues
  • Alarms may not play when your display is asleep for a long period of time (FB10086690)
    • Workaround: Make your display not fall asleep in Settings > Lock Screen > Turn display off on ____ when inactive. You can turn your brightness off.
    • Issue present since macOS 13.0
  • Clipboard History always enabled after rebooting
  • More macOS 26.3 Finder column view silliness
  • Scroll bar is cut off on the bottom-right in Spotlight and System Settings
Untested Issues
  • Some major graphical issues may be present in this beta.
    • Present since (26.3 Beta 3)
  • On non notched devices, the volume indicator may have excessive padding in full screen (Present since 26.2 Beta 3)
  • Karabiner Elements seems to not be able to load Virtual Keyboard Driver and this all keyboard remapping doesn't work.
Additional Notes
  • If you are encountering a memory management issue (eg. a Memory Leak), please provide what app/process it is coming from (Using Activity Monitor) and what you were doing in that app.
  • When a new macOS release comes out, all issues automatically go to "Untested Issues" until they are moved by someone. Issues that stay in Untested for 3 releases (beta or smooth) will be removed from all future threads. When there is a new macOS release, please be sure to let us know about the issue's status by moving it to either "Remaining Issues" or "Resolved Issues"
  • macOS 26 Tahoe will be installed via a Delta Update in System Settings. Please be aware about this, as the update won’t install with an installer.
  • macOS 26 is officially supported on the following devices. If your device is not listed below, it has unfortunately been dropped by Apple. Any efforts of trying to get your Mac running macOS 26, including bugs should be discussed in this thread.
    • MacBook Air: M1, M2, M3, M4
    • MacBook Pro: 2019 (16 Inch only), Intel 2020 (4 thunderbolt port only), M1, M1 Pro/M1 Max, M2, M2 Pro/M2 Max, M3/M3 Pro/M3 Max, M4/M4 Pro/M4 Max, M5
    • Mac mini: M1, M2/M2 Pro, M4/M4 Pro
    • iMac: 5K 2020, M1, M3, M4
    • Mac Pro: 2019, M2 Ultra
    • Mac Studio: M1 Max/Ultra, M2 Max/Ultra, M3 Ultra, M4 Max
  • macOS Tahoe 26.4 Release Notes
  • macOS Tahoe Overview
  • Apple Security Updates
  • Become an Apple Beta Tester
  • Full Installer (Direct Download)
Issue resolved:

  • 12-Hour times is displaying noon times as 00:00PM - 00:59PM instead of 12:00PM to 12:59PM
    • this turned out to be a corrupted preference of some kind. Fixed in terminal.
      • defaults delete -g AppleICUTimeFormatStrings
      • defaults delete -g AppleLocale
      • killall Finder
 
Last edited:
  • Love
Reactions: Adora
I got a warning that 1Password 6 (Intel app) will not be supported in future macOS versions anymore.

Will they even remove Rosetta in macOS 27?

Edit: This came when clicking on more info. Not sure if there is anything new.

Using Intel-based apps on a Mac with Apple silicon - Apple Support

Rosetta enables a Mac with Apple silicon to run Intel-based apps. Support for Rosetta will end in a future version of macOS, so check with the app's developer for an updated version.
support.apple.com support.apple.com

"Rosetta is currently available for any Mac with Apple silicon, and it will remain available through the forthcoming macOS 27 — the next major macOS release. Starting with computers using macOS 28, Rosetta functionality will be available only for certain older, unmaintained games that rely on Intel-based frameworks."

Edit: https://www.macrumors.com/2026/02/16/macos-tahoe-26-4-rosetta-2-warnings/
 
Last edited:
OK, so they are starting to issue Intel app warnings with macOS 26.4...?

They also did this with the phase out of 32-bit apps back in the day. I think later 10.13.x release of macOS got a one-time warning (per app), but starting with 10.14 it was one warning per app per month, so you would get repeatedly nagged. (Appropriately so, I would say.)

Yes, macOS 28 (releasing in "late 2027") will mark the beginning of the Rosetta 2 phase-out. They're saying that they are going to keep supporting it for "unmaintained games" but they have not provided any details on what that means beyond the one sentence.

We'll probably hear more during WWDC in June.
 
  • Like
Reactions: Adora and StevenRCE0
PotentPeas said:
OK, so they are starting to issue Intel app warnings with macOS 26.4...?

They also did this with the phase out of 32-bit apps back in the day. I think later 10.13.x release of macOS got a one-time warning (per app), but starting with 10.14 it was one warning per app per month, so you would get repeatedly nagged. (Appropriately so, I would say.)

Yes, macOS 28 (releasing in "late 2027") will mark the beginning of the Rosetta 2 phase-out. They're saying that they are going to keep supporting it for "unmaintained games" but they have not provided any details on what that means beyond the one sentence.

We'll probably hear more during WWDC in June.
Click to expand...

At least it didn't appear again after a reboot. Maybe after every update now once.


The update damaged two of my internal partitions. Just old macOS installers but still not a good sign.

My Mac doesn't support anything older than Sequoia and I wanted to delete the other ones anyway. I get those warnings now always when they are mounted after a reboot.

Screenshot 2026-02-16 at 20.59.33.png
Screenshot 2026-02-16 at 20.59.28.png


Screenshot 2026-02-16 at 21.02.43.png
 
  • Like
Reactions: Bonobo
Adora said:
At least it didn't appear again after a reboot. Maybe after every update now once.


The update damaged two of my internal partitions. Just old macOS installers but still not a good sign.

My Mac doesn't support anything older than Sequoia and I wanted to delete the other ones anyway. I get those warnings now always when they are mounted after a reboot.

View attachment 2605546View attachment 2605547

View attachment 2605548
Click to expand...

this happened to me too... - exact same issue, disk repair first aid found the issue but didnt fix it... had no choice but to wipe the drive, format as APFS and recover from backup - on my system it appears to be drives formatted as macOS Journaled.
 
  • Like
  • Sad
Reactions: Bonobo and Adora
auslad88 said:
this happened to me too... - exact same issue, disk repair first aid found the issue but didnt fix it... had no choice but to wipe the drive, format as APFS and recover from backup - on my system it appears to be drives formatted as macOS Journaled.
Click to expand...

Yes they all have the old Mac OS Extended Journaled (JHFS+) files system. But they live in an APFS container what is really confusing. I hate APFS. Luckily mine do not include any data I need. Seems worse what happened to you. 🙁

I abandoned the old file system for storing any data when I discovered there is no option for encrypting the drives anymore. With APFS I regularly have corrupted TimeMachine drives. The old file system was much more reliable. I still wish I could use it as my main drive and for encrypted backups.

Edit: It seems all four partitions with macOS installers are damaged. I just only get that warning message for two of them. But first aid doesn't work with all four. I can't even mount any of them when they are ejected. I have to reboot to make them all appear again on my desktop. There isn't even an error message when I click on mount in Disk Utility, it's simply not doing anything.

Screenshot 2026-02-17 at 01.58.32.png
 
Last edited:
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back